Corrosion of 304SS in H2SO4 containing molybdates and tungstates as inhibitors

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The electrochemical behavior of 304 stainless steel has been thoroughly investigated in H2SO4 as a function of H2SO4, chloride ions, and molybdate ions concentrations at room temperature. In addition, the effects of other ions such iodide, bromide, and tungstate ions have been studied. Standard corrosion techniques that have been used include Tafel measurements, Rp vs. time measurements, cyclic polarizations measurements, and the critical pitting potential measurements. Initial results indicate that the addition of molybdate ions at sufficient concentrations enhances both the resistance to general corrosion and to pitting corrosion in the case of chloride ions presence. It is suggested that molybdate ions inhibit pitting by lowering the current densities in the active and passive range, enhancing repassivation in the process, making it difficult for metastable pits to grow into stable ones.

Original languageEnglish
Title of host publicationEuropean Corrosion Congress 2010 - EUROCORR 2010
Number of pages1
Publication statusPublished - 2010
EventEuropean Corrosion Congress 2010 - EUROCORR 2010 - Moscow, Russian Federation
Duration: Sept 13 2010Sept 17 2010

Publication series

NameEuropean Corrosion Congress 2010 - EUROCORR 2010


ConferenceEuropean Corrosion Congress 2010 - EUROCORR 2010
Country/TerritoryRussian Federation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films


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